我剛才問了 GPT, 稀土對數字芯片影響有限， 被誇大了。美國可以用 關鍵軟件 來反製 ，兩敗俱傷，雙方可能都會讓步

For TSMC's main business (logic chips), the effect is limited but not zero:

• Low direct impact:
  TSMC's chips (e.g., Apple A-series, Nvidia GPUs，and Broadcom ASICs ) are made mainly from silicon, not gallium or germanium.
  These are standard CMOS silicon processes, so rare earths aren't a major input.